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Fake JSON API vs serpstack

Same instrument, two spec sheets — measured, not claimed.

APIFake JSON APIHEALTHY88serpstackHEALTHY93
Uptime · 30d
Uptime · 90d99.02%99.02%
Uptime · 30d98.3%98.3%
P50 · ms865492
P95 · ms20061442
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Fake JSON API vs serpstack: common questions

Which is more reliable, Fake JSON API or serpstack?

Both are neck-and-neck — Fake JSON API and serpstack each measure 99.02% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Fake JSON API or serpstack?

serpstack has the lower median latency in our checks — Fake JSON API responds in 865 ms versus serpstack at 492 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Fake JSON API and serpstack need an API key?

Fake JSON API needs no key, while serpstack requires a free API key. If you want to start calling without signup, reach for Fake JSON API first.

Can I call Fake JSON API and serpstack from the browser?

Only Fake JSON API is browser-friendly — it returns CORS headers over HTTPS. serpstack needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Fake JSON API and serpstack free for commercial use?

Fake JSON API has unclear commercial terms, and serpstack has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.